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v = |10, 20, 30, 40|
i = |2, 1, 3|
r = v[i] # r is now |20, 10, 30|   

Returns the vector of the absolute value of the input vector at each element. Missing values are retained, unaltered by the calculation.

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Return the vector of the arc trigonometric function of the input vector at each element. Result is in radians. Missing values are retained, unaltered by the calculation.

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Returns a copy of the input vector (first argument) with zero or more of its values replaced with missing value indicators. The second argument is a number - any value equal to that number in the input vector is replaced with the missing value indicator. See also nobitmap.

Returns the vector of the cosine of the input vector at each element. Input values must be in radians. Missing values are retained, unaltered by the calculation.

Returns the number of elements in a vector.

Returns a vector with as many elements as the input vectors; the elements of the output vector are the integer part of the division of the first vector by the second vector. A missing value in either input vector will result in a missing value in the corresponding place in the output vector.

Returns a string describing the data type of the elements of the given vector, either 'float32' or 'float64'.

Returns the vector of the exponential of the input vector at each element. Missing values are retained, unaltered by the calculation.

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Searches the given vector for a number and returns the index of the first occurrence of it. If an optional third argument is given as the string 'all', then a vector of the indexes of all occurrences of the number is returned. In both cases, if the number is not contained in the vector, nil is returned.

Returns the vector of the integer part of the input vector at each element. Missing values are retained, unaltered by the calculation.

Returns the vector of the natural log of the input vector at each element. Missing values are retained, unaltered by the calculation.

Returns the vector of the log base 10 of the input vector at each element. Missing values are retained, unaltered by the calculation.

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Returns the vector (minimum) value of all the values of the vector. Only non-missing values are considered in the calculation. If there are no valid values, the function returns the missing value indicator.

Returns the mean of all non-missing values in the input vector. If there are no valid input values, then nil is returned.

Merge several vectors. The same as the operator &. The output is a vector with as many elements as the total number of elements in all merged vectors. Merging with the value nil does nothing, and is used to initialise when building a vector from nothing.

Returns a vector where the elements are the remainder of the division of the first vector by the second vector. A missing value in either input vector will result in a missing value in the corresponding place in the output vector. Note that only the integer parts of the inputs are considered in the calculation, meaning that a second parameter of 0.5 would cause a division by zero.

Returns the vector of the negative of the input vector at each element. The same as (-vector). Missing values are retained, unaltered by the calculation.

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Returns a copy of the input vector (first argument) with all of its missing values replaced with the number specified by the second argument. See also bitmap.

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From a given list of V vectors, each with the same number, N, of elements, and a set of P percentiles, computes a new list of P vectors, each containing N elements - one percentile for each of the N elements across all V input vectors. The set of percentiles is supplied as the second argument and can be a vector, a list or a single number. If it is a single number then the result will be a single vector rather than a list of vectors; however, supplying a vector or list with just one percentile will result in a list of one vector result. The function complements the Percentile module, which acts directly on GRIB fields.

Returns the vector of the sign of the values of the input vector at each element-1 for negative values, 1 for positive and 0 for null values. Missing values are retained, unaltered by the calculation.

Returns the vector of the sine of the input vector at each element. Input vector must have values in radians. Missing values are retained, unaltered by the calculation.

Returns a sorted version of the given vector. If no second argument is given, the result will be sorted in ascending order; otherwise, a second argument consisting of a string can be given: '<' for ascending, '>' for descending order.

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v1 = |5, 3, 4, 9, 1, 4.2|
sort(v1)                  # returns |1, 3, 4, 4.2, 5, 9|
sort_indices(v1)          # returns |5, 2, 3, 6, 1, 4|, e.g. the 4th sorted number is the 6th element from the original

Returns the vector of the square root of the input vector at each element. Missing values are retained, unaltered by the calculation.

Returns the sum of all non-missing values in the input vector. If there are no valid input values, then nil is returned.

Return the tangent of the input vector at each element. Input vector must have values in radians. Missing values are retained, unaltered by the calculation.

Converts the input vector to a list. Missing values are converted to nil.

Returns a vector of the unique elements in the input vector.

Sets the default type of new vectors to the type specified by the input string, either 'float32' or 'float64'. The initial default type is float64. After changing the default type, all subsequently created vectors, including the results of operations on existing vectors, will have the new default data type.

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